4292f32ed3
Debugging API is still in use by Node. Revert "[debug] remove deprecated debug command message queue." This reverts commitabdbfc953d
. Revert "[debug] mark more unused debug API as deprecated." This reverts commitd5ada19ce7
. BUG=v8:5530 Review-Url: https://codereview.chromium.org/2537313005 Cr-Commit-Position: refs/heads/master@{#41427}
1733 lines
64 KiB
C++
1733 lines
64 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "src/compiler.h"
|
|
|
|
#include <algorithm>
|
|
#include <memory>
|
|
|
|
#include "src/asmjs/asm-js.h"
|
|
#include "src/asmjs/asm-typer.h"
|
|
#include "src/ast/ast-numbering.h"
|
|
#include "src/ast/prettyprinter.h"
|
|
#include "src/ast/scopes.h"
|
|
#include "src/bootstrapper.h"
|
|
#include "src/codegen.h"
|
|
#include "src/compilation-cache.h"
|
|
#include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
|
|
#include "src/compiler/pipeline.h"
|
|
#include "src/crankshaft/hydrogen.h"
|
|
#include "src/debug/debug.h"
|
|
#include "src/debug/liveedit.h"
|
|
#include "src/frames-inl.h"
|
|
#include "src/full-codegen/full-codegen.h"
|
|
#include "src/globals.h"
|
|
#include "src/heap/heap.h"
|
|
#include "src/interpreter/interpreter.h"
|
|
#include "src/isolate-inl.h"
|
|
#include "src/log-inl.h"
|
|
#include "src/messages.h"
|
|
#include "src/parsing/parsing.h"
|
|
#include "src/parsing/rewriter.h"
|
|
#include "src/parsing/scanner-character-streams.h"
|
|
#include "src/runtime-profiler.h"
|
|
#include "src/snapshot/code-serializer.h"
|
|
#include "src/vm-state-inl.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
|
|
|
|
// A wrapper around a CompilationInfo that detaches the Handles from
|
|
// the underlying DeferredHandleScope and stores them in info_ on
|
|
// destruction.
|
|
class CompilationHandleScope final {
|
|
public:
|
|
explicit CompilationHandleScope(CompilationInfo* info)
|
|
: deferred_(info->isolate()), info_(info) {}
|
|
~CompilationHandleScope() { info_->set_deferred_handles(deferred_.Detach()); }
|
|
|
|
private:
|
|
DeferredHandleScope deferred_;
|
|
CompilationInfo* info_;
|
|
};
|
|
|
|
// Helper that times a scoped region and records the elapsed time.
|
|
struct ScopedTimer {
|
|
explicit ScopedTimer(base::TimeDelta* location) : location_(location) {
|
|
DCHECK(location_ != NULL);
|
|
timer_.Start();
|
|
}
|
|
|
|
~ScopedTimer() { *location_ += timer_.Elapsed(); }
|
|
|
|
base::ElapsedTimer timer_;
|
|
base::TimeDelta* location_;
|
|
};
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Implementation of CompilationJob
|
|
|
|
CompilationJob::Status CompilationJob::PrepareJob() {
|
|
DCHECK(ThreadId::Current().Equals(info()->isolate()->thread_id()));
|
|
DisallowJavascriptExecution no_js(isolate());
|
|
|
|
if (FLAG_trace_opt && info()->IsOptimizing()) {
|
|
OFStream os(stdout);
|
|
os << "[compiling method " << Brief(*info()->closure()) << " using "
|
|
<< compiler_name_;
|
|
if (info()->is_osr()) os << " OSR";
|
|
os << "]" << std::endl;
|
|
}
|
|
|
|
// Delegate to the underlying implementation.
|
|
DCHECK(state() == State::kReadyToPrepare);
|
|
ScopedTimer t(&time_taken_to_prepare_);
|
|
return UpdateState(PrepareJobImpl(), State::kReadyToExecute);
|
|
}
|
|
|
|
CompilationJob::Status CompilationJob::ExecuteJob() {
|
|
std::unique_ptr<DisallowHeapAllocation> no_allocation;
|
|
std::unique_ptr<DisallowHandleAllocation> no_handles;
|
|
std::unique_ptr<DisallowHandleDereference> no_deref;
|
|
std::unique_ptr<DisallowCodeDependencyChange> no_dependency_change;
|
|
if (can_execute_on_background_thread()) {
|
|
no_allocation.reset(new DisallowHeapAllocation());
|
|
no_handles.reset(new DisallowHandleAllocation());
|
|
no_deref.reset(new DisallowHandleDereference());
|
|
no_dependency_change.reset(new DisallowCodeDependencyChange());
|
|
} else {
|
|
DCHECK(ThreadId::Current().Equals(info()->isolate()->thread_id()));
|
|
}
|
|
|
|
// Delegate to the underlying implementation.
|
|
DCHECK(state() == State::kReadyToExecute);
|
|
ScopedTimer t(&time_taken_to_execute_);
|
|
return UpdateState(ExecuteJobImpl(), State::kReadyToFinalize);
|
|
}
|
|
|
|
CompilationJob::Status CompilationJob::FinalizeJob() {
|
|
DCHECK(ThreadId::Current().Equals(info()->isolate()->thread_id()));
|
|
DisallowCodeDependencyChange no_dependency_change;
|
|
DisallowJavascriptExecution no_js(isolate());
|
|
DCHECK(!info()->dependencies()->HasAborted());
|
|
|
|
// Delegate to the underlying implementation.
|
|
DCHECK(state() == State::kReadyToFinalize);
|
|
ScopedTimer t(&time_taken_to_finalize_);
|
|
return UpdateState(FinalizeJobImpl(), State::kSucceeded);
|
|
}
|
|
|
|
CompilationJob::Status CompilationJob::RetryOptimization(BailoutReason reason) {
|
|
DCHECK(info_->IsOptimizing());
|
|
info_->RetryOptimization(reason);
|
|
state_ = State::kFailed;
|
|
return FAILED;
|
|
}
|
|
|
|
CompilationJob::Status CompilationJob::AbortOptimization(BailoutReason reason) {
|
|
DCHECK(info_->IsOptimizing());
|
|
info_->AbortOptimization(reason);
|
|
state_ = State::kFailed;
|
|
return FAILED;
|
|
}
|
|
|
|
void CompilationJob::RecordUnoptimizedCompilationStats() const {
|
|
int code_size;
|
|
if (info()->has_bytecode_array()) {
|
|
code_size = info()->bytecode_array()->SizeIncludingMetadata();
|
|
} else {
|
|
code_size = info()->code()->SizeIncludingMetadata();
|
|
}
|
|
|
|
Counters* counters = isolate()->counters();
|
|
// TODO(4280): Rename counters from "baseline" to "unoptimized" eventually.
|
|
counters->total_baseline_code_size()->Increment(code_size);
|
|
counters->total_baseline_compile_count()->Increment(1);
|
|
|
|
// TODO(5203): Add timers for each phase of compilation.
|
|
}
|
|
|
|
void CompilationJob::RecordOptimizedCompilationStats() const {
|
|
DCHECK(info()->IsOptimizing());
|
|
Handle<JSFunction> function = info()->closure();
|
|
if (!function->IsOptimized()) {
|
|
// Concurrent recompilation and OSR may race. Increment only once.
|
|
int opt_count = function->shared()->opt_count();
|
|
function->shared()->set_opt_count(opt_count + 1);
|
|
}
|
|
double ms_creategraph = time_taken_to_prepare_.InMillisecondsF();
|
|
double ms_optimize = time_taken_to_execute_.InMillisecondsF();
|
|
double ms_codegen = time_taken_to_finalize_.InMillisecondsF();
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[optimizing ");
|
|
function->ShortPrint();
|
|
PrintF(" - took %0.3f, %0.3f, %0.3f ms]\n", ms_creategraph, ms_optimize,
|
|
ms_codegen);
|
|
}
|
|
if (FLAG_trace_opt_stats) {
|
|
static double compilation_time = 0.0;
|
|
static int compiled_functions = 0;
|
|
static int code_size = 0;
|
|
|
|
compilation_time += (ms_creategraph + ms_optimize + ms_codegen);
|
|
compiled_functions++;
|
|
code_size += function->shared()->SourceSize();
|
|
PrintF("Compiled: %d functions with %d byte source size in %fms.\n",
|
|
compiled_functions, code_size, compilation_time);
|
|
}
|
|
if (FLAG_hydrogen_stats) {
|
|
isolate()->GetHStatistics()->IncrementSubtotals(time_taken_to_prepare_,
|
|
time_taken_to_execute_,
|
|
time_taken_to_finalize_);
|
|
}
|
|
}
|
|
|
|
Isolate* CompilationJob::isolate() const { return info()->isolate(); }
|
|
|
|
namespace {
|
|
|
|
void AddWeakObjectToCodeDependency(Isolate* isolate, Handle<HeapObject> object,
|
|
Handle<Code> code) {
|
|
Handle<WeakCell> cell = Code::WeakCellFor(code);
|
|
Heap* heap = isolate->heap();
|
|
if (heap->InNewSpace(*object)) {
|
|
heap->AddWeakNewSpaceObjectToCodeDependency(object, cell);
|
|
} else {
|
|
Handle<DependentCode> dep(heap->LookupWeakObjectToCodeDependency(object));
|
|
dep =
|
|
DependentCode::InsertWeakCode(dep, DependentCode::kWeakCodeGroup, cell);
|
|
heap->AddWeakObjectToCodeDependency(object, dep);
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
void CompilationJob::RegisterWeakObjectsInOptimizedCode(Handle<Code> code) {
|
|
// TODO(turbofan): Move this to pipeline.cc once Crankshaft dies.
|
|
Isolate* const isolate = code->GetIsolate();
|
|
DCHECK(code->is_optimized_code());
|
|
std::vector<Handle<Map>> maps;
|
|
std::vector<Handle<HeapObject>> objects;
|
|
{
|
|
DisallowHeapAllocation no_gc;
|
|
int const mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
|
|
RelocInfo::ModeMask(RelocInfo::CELL);
|
|
for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
|
|
RelocInfo::Mode mode = it.rinfo()->rmode();
|
|
if (mode == RelocInfo::CELL &&
|
|
code->IsWeakObjectInOptimizedCode(it.rinfo()->target_cell())) {
|
|
objects.push_back(handle(it.rinfo()->target_cell(), isolate));
|
|
} else if (mode == RelocInfo::EMBEDDED_OBJECT &&
|
|
code->IsWeakObjectInOptimizedCode(
|
|
it.rinfo()->target_object())) {
|
|
Handle<HeapObject> object(HeapObject::cast(it.rinfo()->target_object()),
|
|
isolate);
|
|
if (object->IsMap()) {
|
|
maps.push_back(Handle<Map>::cast(object));
|
|
} else {
|
|
objects.push_back(object);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (Handle<Map> map : maps) {
|
|
if (map->dependent_code()->IsEmpty(DependentCode::kWeakCodeGroup)) {
|
|
isolate->heap()->AddRetainedMap(map);
|
|
}
|
|
Map::AddDependentCode(map, DependentCode::kWeakCodeGroup, code);
|
|
}
|
|
for (Handle<HeapObject> object : objects) {
|
|
AddWeakObjectToCodeDependency(isolate, object, code);
|
|
}
|
|
code->set_can_have_weak_objects(true);
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Local helper methods that make up the compilation pipeline.
|
|
|
|
namespace {
|
|
|
|
void RecordFunctionCompilation(CodeEventListener::LogEventsAndTags tag,
|
|
CompilationInfo* info) {
|
|
// Log the code generation. If source information is available include
|
|
// script name and line number. Check explicitly whether logging is
|
|
// enabled as finding the line number is not free.
|
|
if (info->isolate()->logger()->is_logging_code_events() ||
|
|
info->isolate()->is_profiling()) {
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
Handle<Script> script = info->parse_info()->script();
|
|
Handle<AbstractCode> abstract_code =
|
|
info->has_bytecode_array()
|
|
? Handle<AbstractCode>::cast(info->bytecode_array())
|
|
: Handle<AbstractCode>::cast(info->code());
|
|
if (abstract_code.is_identical_to(
|
|
info->isolate()->builtins()->CompileLazy())) {
|
|
return;
|
|
}
|
|
int line_num = Script::GetLineNumber(script, shared->start_position()) + 1;
|
|
int column_num =
|
|
Script::GetColumnNumber(script, shared->start_position()) + 1;
|
|
String* script_name = script->name()->IsString()
|
|
? String::cast(script->name())
|
|
: info->isolate()->heap()->empty_string();
|
|
CodeEventListener::LogEventsAndTags log_tag =
|
|
Logger::ToNativeByScript(tag, *script);
|
|
PROFILE(info->isolate(),
|
|
CodeCreateEvent(log_tag, *abstract_code, *shared, script_name,
|
|
line_num, column_num));
|
|
}
|
|
}
|
|
|
|
void EnsureFeedbackMetadata(CompilationInfo* info) {
|
|
DCHECK(info->has_shared_info());
|
|
|
|
// If no type feedback metadata exists, we create it now. At this point the
|
|
// AstNumbering pass has already run. Note the snapshot can contain outdated
|
|
// vectors for a different configuration, hence we also recreate a new vector
|
|
// when the function is not compiled (i.e. no code was serialized).
|
|
|
|
// TODO(mvstanton): reintroduce is_empty() predicate to feedback_metadata().
|
|
if (info->shared_info()->feedback_metadata()->length() == 0 ||
|
|
!info->shared_info()->is_compiled()) {
|
|
Handle<TypeFeedbackMetadata> feedback_metadata = TypeFeedbackMetadata::New(
|
|
info->isolate(), info->literal()->feedback_vector_spec());
|
|
info->shared_info()->set_feedback_metadata(*feedback_metadata);
|
|
}
|
|
|
|
// It's very important that recompiles do not alter the structure of the type
|
|
// feedback vector. Verify that the structure fits the function literal.
|
|
CHECK(!info->shared_info()->feedback_metadata()->SpecDiffersFrom(
|
|
info->literal()->feedback_vector_spec()));
|
|
}
|
|
|
|
bool UseTurboFan(Handle<SharedFunctionInfo> shared) {
|
|
bool optimization_disabled = shared->optimization_disabled();
|
|
bool must_use_ignition_turbo = shared->must_use_ignition_turbo();
|
|
|
|
// Check the enabling conditions for Turbofan.
|
|
// 1. "use asm" code.
|
|
bool is_turbofanable_asm =
|
|
FLAG_turbo_asm && shared->asm_function() && !optimization_disabled;
|
|
|
|
// 2. Fallback for features unsupported by Crankshaft.
|
|
bool is_unsupported_by_crankshaft_but_turbofanable =
|
|
must_use_ignition_turbo && strcmp(FLAG_turbo_filter, "~~") == 0 &&
|
|
!optimization_disabled;
|
|
|
|
// 3. Explicitly enabled by the command-line filter.
|
|
bool passes_turbo_filter = shared->PassesFilter(FLAG_turbo_filter);
|
|
|
|
return is_turbofanable_asm || is_unsupported_by_crankshaft_but_turbofanable ||
|
|
passes_turbo_filter;
|
|
}
|
|
|
|
bool ShouldUseIgnition(CompilationInfo* info) {
|
|
DCHECK(info->has_shared_info());
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
|
|
// Code which can't be supported by the old pipeline should use Ignition.
|
|
if (shared->must_use_ignition_turbo()) return true;
|
|
|
|
// Resumable functions are not supported by {FullCodeGenerator}, suspended
|
|
// activations stored as {JSGeneratorObject} on the heap always assume the
|
|
// underlying code to be based on the bytecode array.
|
|
DCHECK(!IsResumableFunction(shared->kind()));
|
|
|
|
// Skip Ignition for asm.js functions.
|
|
if (shared->asm_function()) return false;
|
|
|
|
// Skip Ignition for asm wasm code.
|
|
if (FLAG_validate_asm && shared->HasAsmWasmData()) {
|
|
return false;
|
|
}
|
|
|
|
// When requesting debug code as a replacement for existing code, we provide
|
|
// the same kind as the existing code (to prevent implicit tier-change).
|
|
if (info->is_debug() && shared->is_compiled()) {
|
|
return !shared->HasBaselineCode();
|
|
}
|
|
|
|
// Code destined for TurboFan should be compiled with Ignition first.
|
|
if (UseTurboFan(shared)) return true;
|
|
|
|
// Only use Ignition for any other function if FLAG_ignition is true.
|
|
if (!FLAG_ignition) return false;
|
|
|
|
// Checks whether top level functions should be passed by the filter.
|
|
if (shared->is_toplevel()) {
|
|
Vector<const char> filter = CStrVector(FLAG_ignition_filter);
|
|
return (filter.length() == 0) || (filter.length() == 1 && filter[0] == '*');
|
|
}
|
|
|
|
// Finally respect the filter.
|
|
return shared->PassesFilter(FLAG_ignition_filter);
|
|
}
|
|
|
|
CompilationJob* GetUnoptimizedCompilationJob(CompilationInfo* info) {
|
|
// Function should have been parsed and analyzed before creating a compilation
|
|
// job.
|
|
DCHECK_NOT_NULL(info->literal());
|
|
DCHECK_NOT_NULL(info->scope());
|
|
|
|
EnsureFeedbackMetadata(info);
|
|
if (ShouldUseIgnition(info)) {
|
|
return interpreter::Interpreter::NewCompilationJob(info);
|
|
} else {
|
|
return FullCodeGenerator::NewCompilationJob(info);
|
|
}
|
|
}
|
|
|
|
void InstallSharedScopeInfo(CompilationInfo* info,
|
|
Handle<SharedFunctionInfo> shared) {
|
|
Handle<ScopeInfo> scope_info = info->scope()->scope_info();
|
|
shared->set_scope_info(*scope_info);
|
|
Scope* outer_scope = info->scope()->GetOuterScopeWithContext();
|
|
if (outer_scope) {
|
|
shared->set_outer_scope_info(*outer_scope->scope_info());
|
|
}
|
|
}
|
|
|
|
void InstallSharedCompilationResult(CompilationInfo* info,
|
|
Handle<SharedFunctionInfo> shared) {
|
|
// TODO(mstarzinger): Compiling for debug code might be used to reveal inner
|
|
// functions via {FindSharedFunctionInfoInScript}, in which case we end up
|
|
// regenerating existing bytecode. Fix this!
|
|
if (info->is_debug() && info->has_bytecode_array()) {
|
|
shared->ClearBytecodeArray();
|
|
}
|
|
DCHECK(!info->code().is_null());
|
|
shared->ReplaceCode(*info->code());
|
|
if (info->has_bytecode_array()) {
|
|
DCHECK(!shared->HasBytecodeArray()); // Only compiled once.
|
|
shared->set_bytecode_array(*info->bytecode_array());
|
|
}
|
|
}
|
|
|
|
void InstallUnoptimizedCode(CompilationInfo* info) {
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
|
|
// Update the shared function info with the scope info.
|
|
InstallSharedScopeInfo(info, shared);
|
|
|
|
// Install compilation result on the shared function info
|
|
InstallSharedCompilationResult(info, shared);
|
|
}
|
|
|
|
CompilationJob::Status FinalizeUnoptimizedCompilationJob(CompilationJob* job) {
|
|
CompilationJob::Status status = job->FinalizeJob();
|
|
if (status == CompilationJob::SUCCEEDED) {
|
|
InstallUnoptimizedCode(job->info());
|
|
job->RecordUnoptimizedCompilationStats();
|
|
}
|
|
return status;
|
|
}
|
|
|
|
bool GenerateUnoptimizedCode(CompilationInfo* info) {
|
|
if (FLAG_validate_asm && info->scope()->asm_module() &&
|
|
!info->shared_info()->is_asm_wasm_broken() && !info->is_debug()) {
|
|
EnsureFeedbackMetadata(info);
|
|
MaybeHandle<FixedArray> wasm_data;
|
|
wasm_data = AsmJs::ConvertAsmToWasm(info->parse_info());
|
|
if (!wasm_data.is_null()) {
|
|
info->shared_info()->set_asm_wasm_data(*wasm_data.ToHandleChecked());
|
|
info->SetCode(info->isolate()->builtins()->InstantiateAsmJs());
|
|
InstallUnoptimizedCode(info);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<CompilationJob> job(GetUnoptimizedCompilationJob(info));
|
|
if (job->PrepareJob() != CompilationJob::SUCCEEDED) return false;
|
|
if (job->ExecuteJob() != CompilationJob::SUCCEEDED) return false;
|
|
if (FinalizeUnoptimizedCompilationJob(job.get()) !=
|
|
CompilationJob::SUCCEEDED) {
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool CompileUnoptimizedCode(CompilationInfo* info) {
|
|
DCHECK(AllowCompilation::IsAllowed(info->isolate()));
|
|
if (!Compiler::Analyze(info->parse_info()) ||
|
|
!GenerateUnoptimizedCode(info)) {
|
|
Isolate* isolate = info->isolate();
|
|
if (!isolate->has_pending_exception()) isolate->StackOverflow();
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
MUST_USE_RESULT MaybeHandle<Code> GetUnoptimizedCode(CompilationInfo* info) {
|
|
VMState<COMPILER> state(info->isolate());
|
|
PostponeInterruptsScope postpone(info->isolate());
|
|
|
|
// Parse and update CompilationInfo with the results.
|
|
if (!parsing::ParseAny(info->parse_info())) return MaybeHandle<Code>();
|
|
DCHECK_EQ(info->shared_info()->language_mode(),
|
|
info->literal()->language_mode());
|
|
|
|
// Compile either unoptimized code or bytecode for the interpreter.
|
|
if (!CompileUnoptimizedCode(info)) return MaybeHandle<Code>();
|
|
|
|
// Record the function compilation event.
|
|
RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info);
|
|
|
|
return info->code();
|
|
}
|
|
|
|
MUST_USE_RESULT MaybeHandle<Code> GetCodeFromOptimizedCodeMap(
|
|
Handle<JSFunction> function, BailoutId osr_ast_id) {
|
|
Handle<SharedFunctionInfo> shared(function->shared());
|
|
DisallowHeapAllocation no_gc;
|
|
CodeAndLiterals cached = shared->SearchOptimizedCodeMap(
|
|
function->context()->native_context(), osr_ast_id);
|
|
if (cached.code != nullptr) {
|
|
// Caching of optimized code enabled and optimized code found.
|
|
if (cached.literals != nullptr) function->set_literals(cached.literals);
|
|
DCHECK(!cached.code->marked_for_deoptimization());
|
|
DCHECK(function->shared()->is_compiled());
|
|
return Handle<Code>(cached.code);
|
|
}
|
|
return MaybeHandle<Code>();
|
|
}
|
|
|
|
void InsertCodeIntoOptimizedCodeMap(CompilationInfo* info) {
|
|
Handle<Code> code = info->code();
|
|
if (code->kind() != Code::OPTIMIZED_FUNCTION) return; // Nothing to do.
|
|
|
|
// Function context specialization folds-in the function context,
|
|
// so no sharing can occur.
|
|
if (info->is_function_context_specializing()) return;
|
|
// Frame specialization implies function context specialization.
|
|
DCHECK(!info->is_frame_specializing());
|
|
|
|
// TODO(4764): When compiling for OSR from bytecode, BailoutId might derive
|
|
// from bytecode offset and overlap with actual BailoutId. No caching!
|
|
if (info->is_osr() && info->is_optimizing_from_bytecode()) return;
|
|
|
|
// Cache optimized context-specific code.
|
|
Handle<JSFunction> function = info->closure();
|
|
Handle<SharedFunctionInfo> shared(function->shared());
|
|
Handle<LiteralsArray> literals(function->literals());
|
|
Handle<Context> native_context(function->context()->native_context());
|
|
SharedFunctionInfo::AddToOptimizedCodeMap(shared, native_context, code,
|
|
literals, info->osr_ast_id());
|
|
}
|
|
|
|
bool Renumber(ParseInfo* parse_info) {
|
|
if (!AstNumbering::Renumber(parse_info->isolate(), parse_info->zone(),
|
|
parse_info->literal())) {
|
|
return false;
|
|
}
|
|
Handle<SharedFunctionInfo> shared_info = parse_info->shared_info();
|
|
if (!shared_info.is_null()) {
|
|
FunctionLiteral* lit = parse_info->literal();
|
|
shared_info->set_ast_node_count(lit->ast_node_count());
|
|
if (lit->dont_optimize_reason() != kNoReason) {
|
|
shared_info->DisableOptimization(lit->dont_optimize_reason());
|
|
}
|
|
if (lit->flags() & AstProperties::kMustUseIgnitionTurbo) {
|
|
shared_info->set_must_use_ignition_turbo(true);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool GetOptimizedCodeNow(CompilationJob* job) {
|
|
CompilationInfo* info = job->info();
|
|
Isolate* isolate = info->isolate();
|
|
|
|
// Parsing is not required when optimizing from existing bytecode.
|
|
if (!info->is_optimizing_from_bytecode()) {
|
|
if (!Compiler::ParseAndAnalyze(info->parse_info())) return false;
|
|
EnsureFeedbackMetadata(info);
|
|
}
|
|
|
|
JSFunction::EnsureLiterals(info->closure());
|
|
|
|
TimerEventScope<TimerEventRecompileSynchronous> timer(isolate);
|
|
RuntimeCallTimerScope runtimeTimer(isolate,
|
|
&RuntimeCallStats::RecompileSynchronous);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
|
|
"V8.RecompileSynchronous");
|
|
|
|
if (job->PrepareJob() != CompilationJob::SUCCEEDED ||
|
|
job->ExecuteJob() != CompilationJob::SUCCEEDED ||
|
|
job->FinalizeJob() != CompilationJob::SUCCEEDED) {
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[aborted optimizing ");
|
|
info->closure()->ShortPrint();
|
|
PrintF(" because: %s]\n", GetBailoutReason(info->bailout_reason()));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Success!
|
|
job->RecordOptimizedCompilationStats();
|
|
DCHECK(!isolate->has_pending_exception());
|
|
InsertCodeIntoOptimizedCodeMap(info);
|
|
RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info);
|
|
return true;
|
|
}
|
|
|
|
bool GetOptimizedCodeLater(CompilationJob* job) {
|
|
CompilationInfo* info = job->info();
|
|
Isolate* isolate = info->isolate();
|
|
|
|
if (!isolate->optimizing_compile_dispatcher()->IsQueueAvailable()) {
|
|
if (FLAG_trace_concurrent_recompilation) {
|
|
PrintF(" ** Compilation queue full, will retry optimizing ");
|
|
info->closure()->ShortPrint();
|
|
PrintF(" later.\n");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (isolate->heap()->HighMemoryPressure()) {
|
|
if (FLAG_trace_concurrent_recompilation) {
|
|
PrintF(" ** High memory pressure, will retry optimizing ");
|
|
info->closure()->ShortPrint();
|
|
PrintF(" later.\n");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Parsing is not required when optimizing from existing bytecode.
|
|
if (!info->is_optimizing_from_bytecode()) {
|
|
if (!Compiler::ParseAndAnalyze(info->parse_info())) return false;
|
|
EnsureFeedbackMetadata(info);
|
|
}
|
|
|
|
JSFunction::EnsureLiterals(info->closure());
|
|
|
|
TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate());
|
|
RuntimeCallTimerScope runtimeTimer(info->isolate(),
|
|
&RuntimeCallStats::RecompileSynchronous);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
|
|
"V8.RecompileSynchronous");
|
|
|
|
if (job->PrepareJob() != CompilationJob::SUCCEEDED) return false;
|
|
isolate->optimizing_compile_dispatcher()->QueueForOptimization(job);
|
|
|
|
if (FLAG_trace_concurrent_recompilation) {
|
|
PrintF(" ** Queued ");
|
|
info->closure()->ShortPrint();
|
|
PrintF(" for concurrent optimization.\n");
|
|
}
|
|
return true;
|
|
}
|
|
|
|
MaybeHandle<Code> GetOptimizedCode(Handle<JSFunction> function,
|
|
Compiler::ConcurrencyMode mode,
|
|
BailoutId osr_ast_id = BailoutId::None(),
|
|
JavaScriptFrame* osr_frame = nullptr) {
|
|
Isolate* isolate = function->GetIsolate();
|
|
Handle<SharedFunctionInfo> shared(function->shared(), isolate);
|
|
|
|
bool ignition_osr = osr_frame && osr_frame->is_interpreted();
|
|
DCHECK_IMPLIES(ignition_osr, !osr_ast_id.IsNone());
|
|
DCHECK_IMPLIES(ignition_osr, FLAG_ignition_osr);
|
|
|
|
// Shared function no longer needs to be tiered up
|
|
shared->set_marked_for_tier_up(false);
|
|
|
|
Handle<Code> cached_code;
|
|
// TODO(4764): When compiling for OSR from bytecode, BailoutId might derive
|
|
// from bytecode offset and overlap with actual BailoutId. No lookup!
|
|
if (!ignition_osr &&
|
|
GetCodeFromOptimizedCodeMap(function, osr_ast_id)
|
|
.ToHandle(&cached_code)) {
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[found optimized code for ");
|
|
function->ShortPrint();
|
|
if (!osr_ast_id.IsNone()) {
|
|
PrintF(" at OSR AST id %d", osr_ast_id.ToInt());
|
|
}
|
|
PrintF("]\n");
|
|
}
|
|
return cached_code;
|
|
}
|
|
|
|
// Reset profiler ticks, function is no longer considered hot.
|
|
DCHECK(shared->is_compiled());
|
|
if (shared->HasBaselineCode()) {
|
|
shared->code()->set_profiler_ticks(0);
|
|
} else if (shared->HasBytecodeArray()) {
|
|
shared->set_profiler_ticks(0);
|
|
}
|
|
|
|
VMState<COMPILER> state(isolate);
|
|
DCHECK(!isolate->has_pending_exception());
|
|
PostponeInterruptsScope postpone(isolate);
|
|
bool use_turbofan = UseTurboFan(shared) || ignition_osr;
|
|
std::unique_ptr<CompilationJob> job(
|
|
use_turbofan ? compiler::Pipeline::NewCompilationJob(function)
|
|
: new HCompilationJob(function));
|
|
CompilationInfo* info = job->info();
|
|
ParseInfo* parse_info = info->parse_info();
|
|
|
|
info->SetOptimizingForOsr(osr_ast_id, osr_frame);
|
|
|
|
// Do not use Crankshaft/TurboFan if we need to be able to set break points.
|
|
if (info->shared_info()->HasDebugInfo()) {
|
|
info->AbortOptimization(kFunctionBeingDebugged);
|
|
return MaybeHandle<Code>();
|
|
}
|
|
|
|
// Limit the number of times we try to optimize functions.
|
|
const int kMaxOptCount =
|
|
FLAG_deopt_every_n_times == 0 ? FLAG_max_opt_count : 1000;
|
|
if (info->shared_info()->opt_count() > kMaxOptCount) {
|
|
info->AbortOptimization(kDeoptimizedTooManyTimes);
|
|
return MaybeHandle<Code>();
|
|
}
|
|
|
|
TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate);
|
|
RuntimeCallTimerScope runtimeTimer(isolate, &RuntimeCallStats::OptimizeCode);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.OptimizeCode");
|
|
|
|
// TurboFan can optimize directly from existing bytecode.
|
|
if (use_turbofan && ShouldUseIgnition(info)) {
|
|
if (info->is_osr() && !ignition_osr) return MaybeHandle<Code>();
|
|
DCHECK(shared->HasBytecodeArray());
|
|
info->MarkAsOptimizeFromBytecode();
|
|
}
|
|
|
|
// Verify that OSR compilations are delegated to the correct graph builder.
|
|
// Depending on the underlying frame the semantics of the {BailoutId} differ
|
|
// and the various graph builders hard-code a certain semantic:
|
|
// - Interpreter : The BailoutId represents a bytecode offset.
|
|
// - FullCodegen : The BailoutId represents the id of an AST node.
|
|
DCHECK_IMPLIES(info->is_osr() && ignition_osr,
|
|
info->is_optimizing_from_bytecode());
|
|
DCHECK_IMPLIES(info->is_osr() && !ignition_osr,
|
|
!info->is_optimizing_from_bytecode());
|
|
|
|
// In case of concurrent recompilation, all handles below this point will be
|
|
// allocated in a deferred handle scope that is detached and handed off to
|
|
// the background thread when we return.
|
|
std::unique_ptr<CompilationHandleScope> compilation;
|
|
if (mode == Compiler::CONCURRENT) {
|
|
compilation.reset(new CompilationHandleScope(info));
|
|
}
|
|
|
|
// In case of TurboFan, all handles below will be canonicalized.
|
|
std::unique_ptr<CanonicalHandleScope> canonical;
|
|
if (use_turbofan) canonical.reset(new CanonicalHandleScope(info->isolate()));
|
|
|
|
// Reopen handles in the new CompilationHandleScope.
|
|
info->ReopenHandlesInNewHandleScope();
|
|
parse_info->ReopenHandlesInNewHandleScope();
|
|
|
|
if (mode == Compiler::CONCURRENT) {
|
|
if (GetOptimizedCodeLater(job.get())) {
|
|
job.release(); // The background recompile job owns this now.
|
|
return isolate->builtins()->InOptimizationQueue();
|
|
}
|
|
} else {
|
|
if (GetOptimizedCodeNow(job.get())) return info->code();
|
|
}
|
|
|
|
if (isolate->has_pending_exception()) isolate->clear_pending_exception();
|
|
return MaybeHandle<Code>();
|
|
}
|
|
|
|
CompilationJob::Status FinalizeOptimizedCompilationJob(CompilationJob* job) {
|
|
CompilationInfo* info = job->info();
|
|
Isolate* isolate = info->isolate();
|
|
|
|
TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate());
|
|
RuntimeCallTimerScope runtimeTimer(isolate,
|
|
&RuntimeCallStats::RecompileSynchronous);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
|
|
"V8.RecompileSynchronous");
|
|
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
|
|
// Reset profiler ticks, function is no longer considered hot.
|
|
if (shared->HasBaselineCode()) {
|
|
shared->code()->set_profiler_ticks(0);
|
|
} else if (shared->HasBytecodeArray()) {
|
|
shared->set_profiler_ticks(0);
|
|
}
|
|
|
|
DCHECK(!shared->HasDebugInfo());
|
|
|
|
// 1) Optimization on the concurrent thread may have failed.
|
|
// 2) The function may have already been optimized by OSR. Simply continue.
|
|
// Except when OSR already disabled optimization for some reason.
|
|
// 3) The code may have already been invalidated due to dependency change.
|
|
// 4) Code generation may have failed.
|
|
if (job->state() == CompilationJob::State::kReadyToFinalize) {
|
|
if (shared->optimization_disabled()) {
|
|
job->RetryOptimization(kOptimizationDisabled);
|
|
} else if (info->dependencies()->HasAborted()) {
|
|
job->RetryOptimization(kBailedOutDueToDependencyChange);
|
|
} else if (job->FinalizeJob() == CompilationJob::SUCCEEDED) {
|
|
job->RecordOptimizedCompilationStats();
|
|
RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, info);
|
|
if (shared
|
|
->SearchOptimizedCodeMap(info->context()->native_context(),
|
|
info->osr_ast_id())
|
|
.code == nullptr) {
|
|
InsertCodeIntoOptimizedCodeMap(info);
|
|
}
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[completed optimizing ");
|
|
info->closure()->ShortPrint();
|
|
PrintF("]\n");
|
|
}
|
|
info->closure()->ReplaceCode(*info->code());
|
|
return CompilationJob::SUCCEEDED;
|
|
}
|
|
}
|
|
|
|
DCHECK(job->state() == CompilationJob::State::kFailed);
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[aborted optimizing ");
|
|
info->closure()->ShortPrint();
|
|
PrintF(" because: %s]\n", GetBailoutReason(info->bailout_reason()));
|
|
}
|
|
info->closure()->ReplaceCode(shared->code());
|
|
return CompilationJob::FAILED;
|
|
}
|
|
|
|
MaybeHandle<Code> GetBaselineCode(Handle<JSFunction> function) {
|
|
Isolate* isolate = function->GetIsolate();
|
|
VMState<COMPILER> state(isolate);
|
|
PostponeInterruptsScope postpone(isolate);
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, handle(function->shared()));
|
|
CompilationInfo info(&parse_info, function);
|
|
|
|
// Function no longer needs to be tiered up
|
|
function->shared()->set_marked_for_tier_up(false);
|
|
|
|
// Reset profiler ticks, function is no longer considered hot.
|
|
if (function->shared()->HasBytecodeArray()) {
|
|
function->shared()->set_profiler_ticks(0);
|
|
}
|
|
|
|
// Nothing left to do if the function already has baseline code.
|
|
if (function->shared()->code()->kind() == Code::FUNCTION) {
|
|
return Handle<Code>(function->shared()->code());
|
|
}
|
|
|
|
// We do not switch to baseline code when the debugger might have created a
|
|
// copy of the bytecode with break slots to be able to set break points.
|
|
if (function->shared()->HasDebugInfo()) {
|
|
return MaybeHandle<Code>();
|
|
}
|
|
|
|
// Don't generate full-codegen code for functions it can't support.
|
|
if (function->shared()->must_use_ignition_turbo()) {
|
|
return MaybeHandle<Code>();
|
|
}
|
|
DCHECK(!IsResumableFunction(function->shared()->kind()));
|
|
|
|
if (FLAG_trace_opt) {
|
|
OFStream os(stdout);
|
|
os << "[switching method " << Brief(*function) << " to baseline code]"
|
|
<< std::endl;
|
|
}
|
|
|
|
// Parse and update CompilationInfo with the results.
|
|
if (!parsing::ParseFunction(info.parse_info())) return MaybeHandle<Code>();
|
|
Handle<SharedFunctionInfo> shared = info.shared_info();
|
|
DCHECK_EQ(shared->language_mode(), info.literal()->language_mode());
|
|
|
|
// Compile baseline code using the full code generator.
|
|
if (!Compiler::Analyze(info.parse_info()) ||
|
|
!FullCodeGenerator::MakeCode(&info)) {
|
|
if (!isolate->has_pending_exception()) isolate->StackOverflow();
|
|
return MaybeHandle<Code>();
|
|
}
|
|
|
|
// Update the shared function info with the scope info.
|
|
InstallSharedScopeInfo(&info, shared);
|
|
|
|
// Install compilation result on the shared function info
|
|
InstallSharedCompilationResult(&info, shared);
|
|
|
|
// Record the function compilation event.
|
|
RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG, &info);
|
|
|
|
return info.code();
|
|
}
|
|
|
|
MaybeHandle<Code> GetLazyCode(Handle<JSFunction> function) {
|
|
Isolate* isolate = function->GetIsolate();
|
|
DCHECK(!isolate->has_pending_exception());
|
|
DCHECK(!function->is_compiled());
|
|
TimerEventScope<TimerEventCompileCode> compile_timer(isolate);
|
|
RuntimeCallTimerScope runtimeTimer(isolate,
|
|
&RuntimeCallStats::CompileCodeLazy);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileCode");
|
|
AggregatedHistogramTimerScope timer(isolate->counters()->compile_lazy());
|
|
|
|
Handle<Code> cached_code;
|
|
if (GetCodeFromOptimizedCodeMap(function, BailoutId::None())
|
|
.ToHandle(&cached_code)) {
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[found optimized code for ");
|
|
function->ShortPrint();
|
|
PrintF(" during unoptimized compile]\n");
|
|
}
|
|
DCHECK(function->shared()->is_compiled());
|
|
return cached_code;
|
|
}
|
|
|
|
if (function->shared()->marked_for_tier_up()) {
|
|
DCHECK(FLAG_mark_shared_functions_for_tier_up);
|
|
|
|
function->shared()->set_marked_for_tier_up(false);
|
|
|
|
switch (Compiler::NextCompilationTier(*function)) {
|
|
case Compiler::BASELINE: {
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[recompiling function ");
|
|
function->ShortPrint();
|
|
PrintF(
|
|
" to baseline eagerly (shared function marked for tier up)]\n");
|
|
}
|
|
|
|
Handle<Code> code;
|
|
if (GetBaselineCode(function).ToHandle(&code)) {
|
|
return code;
|
|
}
|
|
break;
|
|
}
|
|
case Compiler::OPTIMIZED: {
|
|
if (FLAG_trace_opt) {
|
|
PrintF("[optimizing method ");
|
|
function->ShortPrint();
|
|
PrintF(" eagerly (shared function marked for tier up)]\n");
|
|
}
|
|
|
|
Handle<Code> code;
|
|
// TODO(leszeks): Look into performing this compilation concurrently.
|
|
if (GetOptimizedCode(function, Compiler::NOT_CONCURRENT)
|
|
.ToHandle(&code)) {
|
|
return code;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
|
|
if (function->shared()->is_compiled()) {
|
|
return Handle<Code>(function->shared()->code());
|
|
}
|
|
|
|
if (function->shared()->HasBytecodeArray()) {
|
|
Handle<Code> entry = isolate->builtins()->InterpreterEntryTrampoline();
|
|
function->shared()->ReplaceCode(*entry);
|
|
return entry;
|
|
}
|
|
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, handle(function->shared()));
|
|
CompilationInfo info(&parse_info, function);
|
|
Handle<Code> result;
|
|
ASSIGN_RETURN_ON_EXCEPTION(isolate, result, GetUnoptimizedCode(&info), Code);
|
|
|
|
if (FLAG_always_opt && !info.shared_info()->HasAsmWasmData()) {
|
|
Handle<Code> opt_code;
|
|
if (GetOptimizedCode(function, Compiler::NOT_CONCURRENT)
|
|
.ToHandle(&opt_code)) {
|
|
result = opt_code;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
Handle<SharedFunctionInfo> CompileToplevel(CompilationInfo* info) {
|
|
Isolate* isolate = info->isolate();
|
|
TimerEventScope<TimerEventCompileCode> timer(isolate);
|
|
RuntimeCallTimerScope runtimeTimer(isolate, &RuntimeCallStats::CompileCode);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileCode");
|
|
PostponeInterruptsScope postpone(isolate);
|
|
DCHECK(!isolate->native_context().is_null());
|
|
ParseInfo* parse_info = info->parse_info();
|
|
Handle<Script> script = parse_info->script();
|
|
|
|
// TODO(svenpanne) Obscure place for this, perhaps move to OnBeforeCompile?
|
|
FixedArray* array = isolate->native_context()->embedder_data();
|
|
script->set_context_data(array->get(v8::Context::kDebugIdIndex));
|
|
|
|
isolate->debug()->OnBeforeCompile(script);
|
|
|
|
Handle<SharedFunctionInfo> result;
|
|
|
|
{ VMState<COMPILER> state(info->isolate());
|
|
if (parse_info->literal() == nullptr &&
|
|
!parsing::ParseProgram(parse_info)) {
|
|
return Handle<SharedFunctionInfo>::null();
|
|
}
|
|
|
|
FunctionLiteral* lit = parse_info->literal();
|
|
|
|
// Measure how long it takes to do the compilation; only take the
|
|
// rest of the function into account to avoid overlap with the
|
|
// parsing statistics.
|
|
RuntimeCallTimerScope runtimeTimer(
|
|
isolate, parse_info->is_eval() ? &RuntimeCallStats::CompileEval
|
|
: &RuntimeCallStats::Compile);
|
|
HistogramTimer* rate = parse_info->is_eval()
|
|
? info->isolate()->counters()->compile_eval()
|
|
: info->isolate()->counters()->compile();
|
|
HistogramTimerScope timer(rate);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
|
|
parse_info->is_eval() ? "V8.CompileEval" : "V8.Compile");
|
|
|
|
// Allocate a shared function info object.
|
|
DCHECK_EQ(kNoSourcePosition, lit->function_token_position());
|
|
result = isolate->factory()->NewSharedFunctionInfoForLiteral(lit, script);
|
|
result->set_is_toplevel(true);
|
|
parse_info->set_shared_info(result);
|
|
parse_info->set_function_literal_id(result->function_literal_id());
|
|
|
|
// Compile the code.
|
|
if (!CompileUnoptimizedCode(info)) {
|
|
return Handle<SharedFunctionInfo>::null();
|
|
}
|
|
|
|
Handle<String> script_name =
|
|
script->name()->IsString()
|
|
? Handle<String>(String::cast(script->name()))
|
|
: isolate->factory()->empty_string();
|
|
CodeEventListener::LogEventsAndTags log_tag =
|
|
parse_info->is_eval()
|
|
? CodeEventListener::EVAL_TAG
|
|
: Logger::ToNativeByScript(CodeEventListener::SCRIPT_TAG, *script);
|
|
|
|
PROFILE(isolate, CodeCreateEvent(log_tag, result->abstract_code(), *result,
|
|
*script_name));
|
|
|
|
if (!script.is_null())
|
|
script->set_compilation_state(Script::COMPILATION_STATE_COMPILED);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// Implementation of Compiler
|
|
|
|
bool Compiler::Analyze(ParseInfo* info) {
|
|
DCHECK_NOT_NULL(info->literal());
|
|
if (!Rewriter::Rewrite(info)) return false;
|
|
DeclarationScope::Analyze(info, AnalyzeMode::kRegular);
|
|
if (!Renumber(info)) return false;
|
|
DCHECK_NOT_NULL(info->scope());
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::ParseAndAnalyze(ParseInfo* info) {
|
|
if (!parsing::ParseAny(info)) return false;
|
|
if (!Compiler::Analyze(info)) return false;
|
|
DCHECK_NOT_NULL(info->literal());
|
|
DCHECK_NOT_NULL(info->scope());
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::Compile(Handle<JSFunction> function, ClearExceptionFlag flag) {
|
|
if (function->is_compiled()) return true;
|
|
Isolate* isolate = function->GetIsolate();
|
|
DCHECK(AllowCompilation::IsAllowed(isolate));
|
|
|
|
// Start a compilation.
|
|
Handle<Code> code;
|
|
if (!GetLazyCode(function).ToHandle(&code)) {
|
|
if (flag == CLEAR_EXCEPTION) {
|
|
isolate->clear_pending_exception();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Install code on closure.
|
|
function->ReplaceCode(*code);
|
|
JSFunction::EnsureLiterals(function);
|
|
|
|
// Check postconditions on success.
|
|
DCHECK(!isolate->has_pending_exception());
|
|
DCHECK(function->shared()->is_compiled());
|
|
DCHECK(function->is_compiled());
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::CompileBaseline(Handle<JSFunction> function) {
|
|
Isolate* isolate = function->GetIsolate();
|
|
DCHECK(AllowCompilation::IsAllowed(isolate));
|
|
|
|
// Start a compilation.
|
|
Handle<Code> code;
|
|
if (!GetBaselineCode(function).ToHandle(&code)) {
|
|
// Baseline generation failed, get unoptimized code.
|
|
DCHECK(function->shared()->is_compiled());
|
|
code = handle(function->shared()->code());
|
|
isolate->clear_pending_exception();
|
|
}
|
|
|
|
// Install code on closure.
|
|
function->ReplaceCode(*code);
|
|
JSFunction::EnsureLiterals(function);
|
|
|
|
// Check postconditions on success.
|
|
DCHECK(!isolate->has_pending_exception());
|
|
DCHECK(function->shared()->is_compiled());
|
|
DCHECK(function->is_compiled());
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::CompileOptimized(Handle<JSFunction> function,
|
|
ConcurrencyMode mode) {
|
|
if (function->IsOptimized()) return true;
|
|
Isolate* isolate = function->GetIsolate();
|
|
DCHECK(AllowCompilation::IsAllowed(isolate));
|
|
|
|
// Start a compilation.
|
|
Handle<Code> code;
|
|
if (!GetOptimizedCode(function, mode).ToHandle(&code)) {
|
|
// Optimization failed, get unoptimized code.
|
|
DCHECK(!isolate->has_pending_exception());
|
|
if (function->shared()->is_compiled()) {
|
|
code = handle(function->shared()->code(), isolate);
|
|
} else if (function->shared()->HasBytecodeArray()) {
|
|
code = isolate->builtins()->InterpreterEntryTrampoline();
|
|
function->shared()->ReplaceCode(*code);
|
|
} else {
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, handle(function->shared()));
|
|
CompilationInfo info(&parse_info, function);
|
|
if (!GetUnoptimizedCode(&info).ToHandle(&code)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Install code on closure.
|
|
function->ReplaceCode(*code);
|
|
JSFunction::EnsureLiterals(function);
|
|
|
|
// Check postconditions on success.
|
|
DCHECK(!isolate->has_pending_exception());
|
|
DCHECK(function->shared()->is_compiled());
|
|
DCHECK(function->is_compiled());
|
|
return true;
|
|
}
|
|
|
|
bool Compiler::CompileDebugCode(Handle<SharedFunctionInfo> shared) {
|
|
Isolate* isolate = shared->GetIsolate();
|
|
DCHECK(AllowCompilation::IsAllowed(isolate));
|
|
|
|
// Start a compilation.
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, shared);
|
|
CompilationInfo info(&parse_info, Handle<JSFunction>::null());
|
|
info.MarkAsDebug();
|
|
if (GetUnoptimizedCode(&info).is_null()) {
|
|
isolate->clear_pending_exception();
|
|
return false;
|
|
}
|
|
|
|
// Check postconditions on success.
|
|
DCHECK(!isolate->has_pending_exception());
|
|
DCHECK(shared->is_compiled());
|
|
DCHECK(shared->HasDebugCode());
|
|
return true;
|
|
}
|
|
|
|
MaybeHandle<JSArray> Compiler::CompileForLiveEdit(Handle<Script> script) {
|
|
Isolate* isolate = script->GetIsolate();
|
|
DCHECK(AllowCompilation::IsAllowed(isolate));
|
|
|
|
// In order to ensure that live edit function info collection finds the newly
|
|
// generated shared function infos, clear the script's list temporarily
|
|
// and restore it at the end of this method.
|
|
Handle<Object> old_function_infos(script->shared_function_infos(), isolate);
|
|
script->set_shared_function_infos(Smi::kZero);
|
|
|
|
// Start a compilation.
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, script);
|
|
CompilationInfo info(&parse_info, Handle<JSFunction>::null());
|
|
info.MarkAsDebug();
|
|
|
|
// TODO(635): support extensions.
|
|
const bool compilation_succeeded = !CompileToplevel(&info).is_null();
|
|
Handle<JSArray> infos;
|
|
if (compilation_succeeded) {
|
|
// Check postconditions on success.
|
|
DCHECK(!isolate->has_pending_exception());
|
|
infos = LiveEditFunctionTracker::Collect(parse_info.literal(), script,
|
|
&zone, isolate);
|
|
}
|
|
|
|
// Restore the original function info list in order to remain side-effect
|
|
// free as much as possible, since some code expects the old shared function
|
|
// infos to stick around.
|
|
script->set_shared_function_infos(*old_function_infos);
|
|
|
|
return infos;
|
|
}
|
|
|
|
bool Compiler::EnsureBytecode(CompilationInfo* info) {
|
|
if (!info->shared_info()->is_compiled()) {
|
|
if (GetUnoptimizedCode(info).is_null()) return false;
|
|
}
|
|
DCHECK(info->shared_info()->is_compiled());
|
|
|
|
if (info->shared_info()->HasAsmWasmData()) return false;
|
|
|
|
DCHECK_EQ(ShouldUseIgnition(info), info->shared_info()->HasBytecodeArray());
|
|
return info->shared_info()->HasBytecodeArray();
|
|
}
|
|
|
|
// TODO(turbofan): In the future, unoptimized code with deopt support could
|
|
// be generated lazily once deopt is triggered.
|
|
bool Compiler::EnsureDeoptimizationSupport(CompilationInfo* info) {
|
|
DCHECK_NOT_NULL(info->literal());
|
|
DCHECK_NOT_NULL(info->scope());
|
|
Handle<SharedFunctionInfo> shared = info->shared_info();
|
|
if (!shared->has_deoptimization_support()) {
|
|
Zone zone(info->isolate()->allocator(), ZONE_NAME);
|
|
CompilationInfo unoptimized(info->parse_info(), info->closure());
|
|
unoptimized.EnableDeoptimizationSupport();
|
|
|
|
// Don't generate full-codegen code for functions it can't support.
|
|
if (shared->must_use_ignition_turbo()) return false;
|
|
DCHECK(!IsResumableFunction(shared->kind()));
|
|
|
|
// When we call PrepareForSerializing below, we will change the shared
|
|
// ParseInfo. Make sure to reset it.
|
|
bool old_will_serialize_value = info->parse_info()->will_serialize();
|
|
|
|
// If the current code has reloc info for serialization, also include
|
|
// reloc info for serialization for the new code, so that deopt support
|
|
// can be added without losing IC state.
|
|
if (shared->code()->kind() == Code::FUNCTION &&
|
|
shared->code()->has_reloc_info_for_serialization()) {
|
|
unoptimized.PrepareForSerializing();
|
|
}
|
|
EnsureFeedbackMetadata(&unoptimized);
|
|
|
|
// Ensure we generate and install bytecode first if the function should use
|
|
// Ignition to avoid implicit tier-down.
|
|
if (!shared->is_compiled() && ShouldUseIgnition(info) &&
|
|
!GenerateUnoptimizedCode(info)) {
|
|
return false;
|
|
}
|
|
|
|
if (!FullCodeGenerator::MakeCode(&unoptimized)) return false;
|
|
|
|
info->parse_info()->set_will_serialize(old_will_serialize_value);
|
|
|
|
// The scope info might not have been set if a lazily compiled
|
|
// function is inlined before being called for the first time.
|
|
if (shared->scope_info() == ScopeInfo::Empty(info->isolate())) {
|
|
InstallSharedScopeInfo(info, shared);
|
|
}
|
|
|
|
// Install compilation result on the shared function info
|
|
shared->EnableDeoptimizationSupport(*unoptimized.code());
|
|
|
|
// The existing unoptimized code was replaced with the new one.
|
|
RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG,
|
|
&unoptimized);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// static
|
|
Compiler::CompilationTier Compiler::NextCompilationTier(JSFunction* function) {
|
|
Handle<SharedFunctionInfo> shared(function->shared(), function->GetIsolate());
|
|
if (shared->IsInterpreted()) {
|
|
if (UseTurboFan(shared)) {
|
|
return OPTIMIZED;
|
|
} else {
|
|
return BASELINE;
|
|
}
|
|
} else {
|
|
return OPTIMIZED;
|
|
}
|
|
}
|
|
|
|
MaybeHandle<JSFunction> Compiler::GetFunctionFromEval(
|
|
Handle<String> source, Handle<SharedFunctionInfo> outer_info,
|
|
Handle<Context> context, LanguageMode language_mode,
|
|
ParseRestriction restriction, int eval_scope_position, int eval_position,
|
|
int line_offset, int column_offset, Handle<Object> script_name,
|
|
ScriptOriginOptions options) {
|
|
Isolate* isolate = source->GetIsolate();
|
|
int source_length = source->length();
|
|
isolate->counters()->total_eval_size()->Increment(source_length);
|
|
isolate->counters()->total_compile_size()->Increment(source_length);
|
|
|
|
CompilationCache* compilation_cache = isolate->compilation_cache();
|
|
MaybeHandle<SharedFunctionInfo> maybe_shared_info =
|
|
compilation_cache->LookupEval(source, outer_info, context, language_mode,
|
|
eval_scope_position);
|
|
Handle<SharedFunctionInfo> shared_info;
|
|
|
|
Handle<Script> script;
|
|
if (!maybe_shared_info.ToHandle(&shared_info)) {
|
|
script = isolate->factory()->NewScript(source);
|
|
if (FLAG_trace_deopt) Script::InitLineEnds(script);
|
|
if (!script_name.is_null()) {
|
|
script->set_name(*script_name);
|
|
script->set_line_offset(line_offset);
|
|
script->set_column_offset(column_offset);
|
|
}
|
|
script->set_origin_options(options);
|
|
script->set_compilation_type(Script::COMPILATION_TYPE_EVAL);
|
|
Script::SetEvalOrigin(script, outer_info, eval_position);
|
|
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, script);
|
|
CompilationInfo info(&parse_info, Handle<JSFunction>::null());
|
|
parse_info.set_eval();
|
|
parse_info.set_language_mode(language_mode);
|
|
parse_info.set_parse_restriction(restriction);
|
|
if (!context->IsNativeContext()) {
|
|
parse_info.set_outer_scope_info(handle(context->scope_info()));
|
|
}
|
|
|
|
shared_info = CompileToplevel(&info);
|
|
|
|
if (shared_info.is_null()) {
|
|
return MaybeHandle<JSFunction>();
|
|
} else {
|
|
// If caller is strict mode, the result must be in strict mode as well.
|
|
DCHECK(is_sloppy(language_mode) ||
|
|
is_strict(shared_info->language_mode()));
|
|
compilation_cache->PutEval(source, outer_info, context, shared_info,
|
|
eval_scope_position);
|
|
}
|
|
}
|
|
|
|
Handle<JSFunction> result =
|
|
isolate->factory()->NewFunctionFromSharedFunctionInfo(
|
|
shared_info, context, NOT_TENURED);
|
|
|
|
// OnAfterCompile has to be called after we create the JSFunction, which we
|
|
// may require to recompile the eval for debugging, if we find a function
|
|
// that contains break points in the eval script.
|
|
isolate->debug()->OnAfterCompile(script);
|
|
|
|
return result;
|
|
}
|
|
|
|
namespace {
|
|
|
|
bool CodeGenerationFromStringsAllowed(Isolate* isolate,
|
|
Handle<Context> context) {
|
|
DCHECK(context->allow_code_gen_from_strings()->IsFalse(isolate));
|
|
// Check with callback if set.
|
|
AllowCodeGenerationFromStringsCallback callback =
|
|
isolate->allow_code_gen_callback();
|
|
if (callback == NULL) {
|
|
// No callback set and code generation disallowed.
|
|
return false;
|
|
} else {
|
|
// Callback set. Let it decide if code generation is allowed.
|
|
VMState<EXTERNAL> state(isolate);
|
|
return callback(v8::Utils::ToLocal(context));
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
MaybeHandle<JSFunction> Compiler::GetFunctionFromString(
|
|
Handle<Context> context, Handle<String> source,
|
|
ParseRestriction restriction) {
|
|
Isolate* const isolate = context->GetIsolate();
|
|
Handle<Context> native_context(context->native_context(), isolate);
|
|
|
|
// Check if native context allows code generation from
|
|
// strings. Throw an exception if it doesn't.
|
|
if (native_context->allow_code_gen_from_strings()->IsFalse(isolate) &&
|
|
!CodeGenerationFromStringsAllowed(isolate, native_context)) {
|
|
Handle<Object> error_message =
|
|
native_context->ErrorMessageForCodeGenerationFromStrings();
|
|
THROW_NEW_ERROR(isolate, NewEvalError(MessageTemplate::kCodeGenFromStrings,
|
|
error_message),
|
|
JSFunction);
|
|
}
|
|
|
|
// Compile source string in the native context.
|
|
int eval_scope_position = 0;
|
|
int eval_position = kNoSourcePosition;
|
|
Handle<SharedFunctionInfo> outer_info(native_context->closure()->shared());
|
|
return Compiler::GetFunctionFromEval(source, outer_info, native_context,
|
|
SLOPPY, restriction, eval_scope_position,
|
|
eval_position);
|
|
}
|
|
|
|
Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForScript(
|
|
Handle<String> source, Handle<Object> script_name, int line_offset,
|
|
int column_offset, ScriptOriginOptions resource_options,
|
|
Handle<Object> source_map_url, Handle<Context> context,
|
|
v8::Extension* extension, ScriptData** cached_data,
|
|
ScriptCompiler::CompileOptions compile_options, NativesFlag natives,
|
|
bool is_module) {
|
|
Isolate* isolate = source->GetIsolate();
|
|
if (compile_options == ScriptCompiler::kNoCompileOptions) {
|
|
cached_data = NULL;
|
|
} else if (compile_options == ScriptCompiler::kProduceParserCache ||
|
|
compile_options == ScriptCompiler::kProduceCodeCache) {
|
|
DCHECK(cached_data && !*cached_data);
|
|
DCHECK(extension == NULL);
|
|
DCHECK(!isolate->debug()->is_loaded());
|
|
} else {
|
|
DCHECK(compile_options == ScriptCompiler::kConsumeParserCache ||
|
|
compile_options == ScriptCompiler::kConsumeCodeCache);
|
|
DCHECK(cached_data && *cached_data);
|
|
DCHECK(extension == NULL);
|
|
}
|
|
int source_length = source->length();
|
|
isolate->counters()->total_load_size()->Increment(source_length);
|
|
isolate->counters()->total_compile_size()->Increment(source_length);
|
|
|
|
LanguageMode language_mode = construct_language_mode(FLAG_use_strict);
|
|
CompilationCache* compilation_cache = isolate->compilation_cache();
|
|
|
|
// Do a lookup in the compilation cache but not for extensions.
|
|
MaybeHandle<SharedFunctionInfo> maybe_result;
|
|
Handle<SharedFunctionInfo> result;
|
|
if (extension == NULL) {
|
|
// First check per-isolate compilation cache.
|
|
maybe_result = compilation_cache->LookupScript(
|
|
source, script_name, line_offset, column_offset, resource_options,
|
|
context, language_mode);
|
|
if (maybe_result.is_null() && FLAG_serialize_toplevel &&
|
|
compile_options == ScriptCompiler::kConsumeCodeCache &&
|
|
!isolate->debug()->is_loaded()) {
|
|
// Then check cached code provided by embedder.
|
|
HistogramTimerScope timer(isolate->counters()->compile_deserialize());
|
|
RuntimeCallTimerScope runtimeTimer(isolate,
|
|
&RuntimeCallStats::CompileDeserialize);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
|
|
"V8.CompileDeserialize");
|
|
Handle<SharedFunctionInfo> result;
|
|
if (CodeSerializer::Deserialize(isolate, *cached_data, source)
|
|
.ToHandle(&result)) {
|
|
// Promote to per-isolate compilation cache.
|
|
compilation_cache->PutScript(source, context, language_mode, result);
|
|
return result;
|
|
}
|
|
// Deserializer failed. Fall through to compile.
|
|
}
|
|
}
|
|
|
|
base::ElapsedTimer timer;
|
|
if (FLAG_profile_deserialization && FLAG_serialize_toplevel &&
|
|
compile_options == ScriptCompiler::kProduceCodeCache) {
|
|
timer.Start();
|
|
}
|
|
|
|
if (!maybe_result.ToHandle(&result) ||
|
|
(FLAG_serialize_toplevel &&
|
|
compile_options == ScriptCompiler::kProduceCodeCache)) {
|
|
// No cache entry found, or embedder wants a code cache. Compile the script.
|
|
|
|
// Create a script object describing the script to be compiled.
|
|
Handle<Script> script = isolate->factory()->NewScript(source);
|
|
if (FLAG_trace_deopt) Script::InitLineEnds(script);
|
|
if (natives == NATIVES_CODE) {
|
|
script->set_type(Script::TYPE_NATIVE);
|
|
} else if (natives == EXTENSION_CODE) {
|
|
script->set_type(Script::TYPE_EXTENSION);
|
|
} else if (natives == INSPECTOR_CODE) {
|
|
script->set_type(Script::TYPE_INSPECTOR);
|
|
}
|
|
if (!script_name.is_null()) {
|
|
script->set_name(*script_name);
|
|
script->set_line_offset(line_offset);
|
|
script->set_column_offset(column_offset);
|
|
}
|
|
script->set_origin_options(resource_options);
|
|
if (!source_map_url.is_null()) {
|
|
script->set_source_mapping_url(*source_map_url);
|
|
}
|
|
|
|
// Compile the function and add it to the cache.
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, script);
|
|
CompilationInfo info(&parse_info, Handle<JSFunction>::null());
|
|
if (is_module) parse_info.set_module();
|
|
if (compile_options != ScriptCompiler::kNoCompileOptions) {
|
|
parse_info.set_cached_data(cached_data);
|
|
}
|
|
parse_info.set_compile_options(compile_options);
|
|
parse_info.set_extension(extension);
|
|
if (!context->IsNativeContext()) {
|
|
parse_info.set_outer_scope_info(handle(context->scope_info()));
|
|
}
|
|
if (FLAG_serialize_toplevel &&
|
|
compile_options == ScriptCompiler::kProduceCodeCache) {
|
|
info.PrepareForSerializing();
|
|
}
|
|
|
|
parse_info.set_language_mode(
|
|
static_cast<LanguageMode>(parse_info.language_mode() | language_mode));
|
|
result = CompileToplevel(&info);
|
|
if (extension == NULL && !result.is_null()) {
|
|
compilation_cache->PutScript(source, context, language_mode, result);
|
|
if (FLAG_serialize_toplevel &&
|
|
compile_options == ScriptCompiler::kProduceCodeCache) {
|
|
HistogramTimerScope histogram_timer(
|
|
isolate->counters()->compile_serialize());
|
|
RuntimeCallTimerScope runtimeTimer(isolate,
|
|
&RuntimeCallStats::CompileSerialize);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
|
|
"V8.CompileSerialize");
|
|
*cached_data = CodeSerializer::Serialize(isolate, result, source);
|
|
if (FLAG_profile_deserialization) {
|
|
PrintF("[Compiling and serializing took %0.3f ms]\n",
|
|
timer.Elapsed().InMillisecondsF());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (result.is_null()) {
|
|
isolate->ReportPendingMessages();
|
|
} else {
|
|
isolate->debug()->OnAfterCompile(script);
|
|
}
|
|
} else if (result->ic_age() != isolate->heap()->global_ic_age()) {
|
|
result->ResetForNewContext(isolate->heap()->global_ic_age());
|
|
}
|
|
return result;
|
|
}
|
|
|
|
Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForStreamedScript(
|
|
Handle<Script> script, ParseInfo* parse_info, int source_length) {
|
|
Isolate* isolate = script->GetIsolate();
|
|
// TODO(titzer): increment the counters in caller.
|
|
isolate->counters()->total_load_size()->Increment(source_length);
|
|
isolate->counters()->total_compile_size()->Increment(source_length);
|
|
|
|
LanguageMode language_mode = construct_language_mode(FLAG_use_strict);
|
|
parse_info->set_language_mode(
|
|
static_cast<LanguageMode>(parse_info->language_mode() | language_mode));
|
|
|
|
CompilationInfo compile_info(parse_info, Handle<JSFunction>::null());
|
|
|
|
// The source was parsed lazily, so compiling for debugging is not possible.
|
|
DCHECK(!compile_info.is_debug());
|
|
|
|
Handle<SharedFunctionInfo> result = CompileToplevel(&compile_info);
|
|
if (!result.is_null()) isolate->debug()->OnAfterCompile(script);
|
|
return result;
|
|
}
|
|
|
|
|
|
Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfo(
|
|
FunctionLiteral* literal, Handle<Script> script,
|
|
CompilationInfo* outer_info) {
|
|
// Precondition: code has been parsed and scopes have been analyzed.
|
|
Isolate* isolate = outer_info->isolate();
|
|
MaybeHandle<SharedFunctionInfo> maybe_existing;
|
|
|
|
// Find any previously allocated shared function info for the given literal.
|
|
if (outer_info->shared_info()->never_compiled()) {
|
|
// On the first compile, there are no existing shared function info for
|
|
// inner functions yet, so do not try to find them. All bets are off for
|
|
// live edit though.
|
|
SLOW_DCHECK(script->FindSharedFunctionInfo(literal).is_null() ||
|
|
isolate->debug()->live_edit_enabled());
|
|
} else {
|
|
maybe_existing = script->FindSharedFunctionInfo(literal);
|
|
}
|
|
|
|
// We found an existing shared function info. If it has any sort of code
|
|
// attached, don't worry about compiling and simply return it. Otherwise,
|
|
// continue to decide whether to eagerly compile.
|
|
// Note that we also carry on if we are compiling eager to obtain code for
|
|
// debugging, unless we already have code with debug break slots.
|
|
Handle<SharedFunctionInfo> existing;
|
|
if (maybe_existing.ToHandle(&existing)) {
|
|
DCHECK(!existing->is_toplevel());
|
|
if (existing->HasBaselineCode() || existing->HasBytecodeArray()) {
|
|
if (!outer_info->is_debug() || existing->HasDebugCode()) {
|
|
return existing;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Allocate a shared function info object.
|
|
Handle<SharedFunctionInfo> result;
|
|
if (!maybe_existing.ToHandle(&result)) {
|
|
result =
|
|
isolate->factory()->NewSharedFunctionInfoForLiteral(literal, script);
|
|
result->set_is_toplevel(false);
|
|
|
|
// If the outer function has been compiled before, we cannot be sure that
|
|
// shared function info for this function literal has been created for the
|
|
// first time. It may have already been compiled previously.
|
|
result->set_never_compiled(outer_info->shared_info()->never_compiled());
|
|
}
|
|
|
|
Zone zone(isolate->allocator(), ZONE_NAME);
|
|
ParseInfo parse_info(&zone, script);
|
|
CompilationInfo info(&parse_info, Handle<JSFunction>::null());
|
|
parse_info.set_literal(literal);
|
|
parse_info.set_shared_info(result);
|
|
parse_info.set_function_literal_id(result->function_literal_id());
|
|
parse_info.set_language_mode(literal->scope()->language_mode());
|
|
parse_info.set_ast_value_factory(
|
|
outer_info->parse_info()->ast_value_factory());
|
|
parse_info.set_ast_value_factory_owned(false);
|
|
|
|
if (outer_info->will_serialize()) info.PrepareForSerializing();
|
|
if (outer_info->is_debug()) info.MarkAsDebug();
|
|
|
|
// If this inner function is already compiled, we don't need to compile
|
|
// again. When compiling for debug, we are not interested in having debug
|
|
// break slots in inner functions, neither for setting break points nor
|
|
// for revealing inner functions.
|
|
// This is especially important for generators. We must not replace the
|
|
// code for generators, as there may be suspended generator objects.
|
|
if (!result->is_compiled()) {
|
|
if (!literal->ShouldEagerCompile()) {
|
|
info.SetCode(isolate->builtins()->CompileLazy());
|
|
Scope* outer_scope = literal->scope()->GetOuterScopeWithContext();
|
|
if (outer_scope) {
|
|
result->set_outer_scope_info(*outer_scope->scope_info());
|
|
}
|
|
} else {
|
|
// Generate code
|
|
TimerEventScope<TimerEventCompileCode> timer(isolate);
|
|
RuntimeCallTimerScope runtimeTimer(isolate,
|
|
&RuntimeCallStats::CompileCode);
|
|
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileCode");
|
|
if (Renumber(info.parse_info()) && GenerateUnoptimizedCode(&info)) {
|
|
// Code generation will ensure that the feedback vector is present and
|
|
// appropriately sized.
|
|
DCHECK(!info.code().is_null());
|
|
if (literal->should_be_used_once_hint()) {
|
|
info.code()->MarkToBeExecutedOnce(isolate);
|
|
}
|
|
} else {
|
|
return Handle<SharedFunctionInfo>::null();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (maybe_existing.is_null()) {
|
|
RecordFunctionCompilation(CodeEventListener::FUNCTION_TAG, &info);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfoForNative(
|
|
v8::Extension* extension, Handle<String> name) {
|
|
Isolate* isolate = name->GetIsolate();
|
|
v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate);
|
|
|
|
// Compute the function template for the native function.
|
|
v8::Local<v8::FunctionTemplate> fun_template =
|
|
extension->GetNativeFunctionTemplate(v8_isolate,
|
|
v8::Utils::ToLocal(name));
|
|
DCHECK(!fun_template.IsEmpty());
|
|
|
|
// Instantiate the function and create a shared function info from it.
|
|
Handle<JSFunction> fun = Handle<JSFunction>::cast(Utils::OpenHandle(
|
|
*fun_template->GetFunction(v8_isolate->GetCurrentContext())
|
|
.ToLocalChecked()));
|
|
Handle<Code> code = Handle<Code>(fun->shared()->code());
|
|
Handle<Code> construct_stub = Handle<Code>(fun->shared()->construct_stub());
|
|
Handle<SharedFunctionInfo> shared = isolate->factory()->NewSharedFunctionInfo(
|
|
name, fun->shared()->num_literals(), FunctionKind::kNormalFunction, code,
|
|
Handle<ScopeInfo>(fun->shared()->scope_info()));
|
|
shared->set_outer_scope_info(fun->shared()->outer_scope_info());
|
|
shared->SetConstructStub(*construct_stub);
|
|
shared->set_feedback_metadata(fun->shared()->feedback_metadata());
|
|
|
|
// Copy the function data to the shared function info.
|
|
shared->set_function_data(fun->shared()->function_data());
|
|
int parameters = fun->shared()->internal_formal_parameter_count();
|
|
shared->set_internal_formal_parameter_count(parameters);
|
|
|
|
return shared;
|
|
}
|
|
|
|
MaybeHandle<Code> Compiler::GetOptimizedCodeForOSR(Handle<JSFunction> function,
|
|
BailoutId osr_ast_id,
|
|
JavaScriptFrame* osr_frame) {
|
|
DCHECK(!osr_ast_id.IsNone());
|
|
DCHECK_NOT_NULL(osr_frame);
|
|
return GetOptimizedCode(function, NOT_CONCURRENT, osr_ast_id, osr_frame);
|
|
}
|
|
|
|
CompilationJob* Compiler::PrepareUnoptimizedCompilationJob(
|
|
CompilationInfo* info) {
|
|
VMState<COMPILER> state(info->isolate());
|
|
std::unique_ptr<CompilationJob> job(GetUnoptimizedCompilationJob(info));
|
|
if (job->PrepareJob() != CompilationJob::SUCCEEDED) {
|
|
return nullptr;
|
|
}
|
|
return job.release();
|
|
}
|
|
|
|
bool Compiler::FinalizeCompilationJob(CompilationJob* raw_job) {
|
|
// Take ownership of compilation job. Deleting job also tears down the zone.
|
|
std::unique_ptr<CompilationJob> job(raw_job);
|
|
|
|
VMState<COMPILER> state(job->info()->isolate());
|
|
if (job->info()->IsOptimizing()) {
|
|
return FinalizeOptimizedCompilationJob(job.get()) ==
|
|
CompilationJob::SUCCEEDED;
|
|
} else {
|
|
if (FinalizeUnoptimizedCompilationJob(job.get()) ==
|
|
CompilationJob::SUCCEEDED) {
|
|
RecordFunctionCompilation(CodeEventListener::LAZY_COMPILE_TAG,
|
|
job->info());
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void Compiler::PostInstantiation(Handle<JSFunction> function,
|
|
PretenureFlag pretenure) {
|
|
Handle<SharedFunctionInfo> shared(function->shared());
|
|
|
|
if (FLAG_always_opt && shared->allows_lazy_compilation() &&
|
|
!function->shared()->HasAsmWasmData() &&
|
|
function->shared()->is_compiled()) {
|
|
function->MarkForOptimization();
|
|
}
|
|
|
|
CodeAndLiterals cached = shared->SearchOptimizedCodeMap(
|
|
function->context()->native_context(), BailoutId::None());
|
|
if (cached.code != nullptr) {
|
|
// Caching of optimized code enabled and optimized code found.
|
|
DCHECK(!cached.code->marked_for_deoptimization());
|
|
DCHECK(function->shared()->is_compiled());
|
|
function->ReplaceCode(cached.code);
|
|
}
|
|
|
|
if (cached.literals != nullptr) {
|
|
DCHECK(shared->is_compiled());
|
|
function->set_literals(cached.literals);
|
|
} else if (shared->is_compiled()) {
|
|
// TODO(mvstanton): pass pretenure flag to EnsureLiterals.
|
|
JSFunction::EnsureLiterals(function);
|
|
}
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|